Head Lice Symptoms
Reviewed: Dr. Gromatzky
4. Itchiness
An itchy scalp is the most common symptom that head lice will cause. They feed by biting through the thin scalp to access blood from the blood vessels just below. When they bite, the bite can result in an allergic reaction, and this results in the itching sensation that we experience.
It will often take around 6 weeks before we feel any itchiness as just a few lice will have little impact. As the lice begin to grow in numbers, however, the effects of their bites gradually become more intense. The lice can still infect other people even before symptoms appear, and this means that a carrier can infect a lot of other people without being aware.
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